Patents by Inventor Shunichi Tomizuka

Shunichi Tomizuka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Friction brakes
    Patent number: 4760900
    Abstract: A composite metal material for a friction brake composed of a sliding friction surface metal layer of grey cast iron and a layer of a high strength different metal having a crack transmission resistance. The grey cast iron and high strength different metal are metallurgically bonded together. In this composition metal material, cracks formed in the sliding friction surface metal layer are prevented from spreading by the high strength different metal having a high crack transmission resistance. An intermediate metal layer may be provided if desired.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: August 2, 1988
    Assignees: The Japan Steel Works, Ltd., Japanese National Railways
    Inventors: Takashi Shima, Katuro Takasawa, Tomoharu Ashikawa, Taro Tsujimura, Yasuo Takenaka, Shunichi Tomizuka
  • Flux for a build-up welding
    Patent number: 3932200
    Abstract: A flux particularly adapted to the carrying out of a method for a build-up welding proposed by the present applicant essentially comprises, by weight, 50 to 90% of calcium fluoride and 10 to 40% of alumina with an addition of one or more compounds selected from the group consisting of 0.5 to 7% of iron oxide, 2 to 10% silica, 1 to 17% of manganese oxide and 2 to 10% of chrome oxide.
    Type: Grant
    Filed: January 31, 1974
    Date of Patent: January 13, 1976
    Assignee: Japan Steel Works, Ltd.
    Inventors: Katao Miyano, Shunichi Tomizuka, Takao Adachi, Tomoo Takenouchi, Satoshi Kondo, Akira Hirama, Yasuo Endo